Precise estimation of the S = 2 Haldane gap by numerical diagonalization

Preprint

5 September 2018

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.1809.01393

Abstract

The Haldane gap of the S=2 Heisenberg antiferromagnet in a one-dimensional linear chain is examined by a numerical-diagonalization method. A precise estimate for the magnitude of the gap is successfully obtained by a multistep convergence-acceleration procedure applied to finite-size diagonalization data under the twisted boundary condition.

Keywords

CONVERGENCE
FINITE
DIAGONALIZATION
MULTISTEP
ANTIFERROMAGNET
HEISENBERG
PRECISE
HALDANE GAP

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